Michael G. Clayman, a former warehouse club buyer, has been writing and speaking about the warehouse club industry professionally since 1997. Clayman has produced over 300 issues of Warehouse Club Focus and twelve versions of the Warehouse Club Industry Guide.

When combining Clayman's eight years of club buying experience, his two years as a financial analyst and fourteen years reporting on the warehouse club industry, he has become the expert on BJ's, Costco and Sam's Club.

Clayman is a go-to source of warehouse club information. In 2007, Clayman appeared on NBC's Today Show discussing the differences between Sam's Club and Costco.

In addition, Clayman has been quoted and interviewed for numerous publications including: The Wall Street Journal, Forbes, Fortune Small Business, The USA Today, Mass Market Retailing, Frozen Food Age, Private Label Buyer, Supermarket News, Woman's Wear Daily, The Philadelphia Inquirer, The Seattle Times, The Tampa Bay Business Journal, Paperboard Packaging, Grocery Headquarters and many others.

Clayman is also a sought after warehouse club speaker. Clayman has spoken at Wal-Mart's Business Leadership Series, PriceSmart's 2006 and 2007 year beginning meeting, Good Humor-Breyers, Ben & Jerry's, Coca-Cola, Heineken, Citigroup, the Grocery Manufacturer's Association, the Boston Seafood Show, an RFID executive roundtable sponsored by Larstan Business Reports, ShopRite and the 2006 Packaging Summit.